Watch: In '20/20' Preview, Jenner Says She's 'Coming After' Trump

Ahead of airing its full interview, ABC's "20/20" shared a preview clip of Diane Sawyer speaking with Caitlyn Jenner where the two discuss the reality star's feelings on President Donald Trump.

"Are you still a Trump Republican?" Sawyer asks.

"Yes, I did vote for Trump but here's the deal breaker with the Republican Party," Jenner says. "...You mess with my community, you do the wrong thing with our community, you don't give us equality and a fair shot, I'm coming after you."

Jenner goes on to say:

"When it comes to all equality issues, for the entire LGBT community, what we need is federal guidance. Just like the previous administration said it was OK to serve as a trans person in the military...I'm trying to get the Republican party to make a change."

Sawyer asks Jenner if she's ever "secretly talked to Trump."

The former "I Am Cait" star explains she said "hi" to the president during the inauguration's cocktail party.

"He wanted me to come play golf with him," she adds. "At that time I thought it was a pretty good idea but since Title IX it's not a good idea so I won't be playing golf with them."

Sawyer then asks Jenner if she thinks Sen. Mitch McConnell or Vice President Mike Pence will "see you if you call them?"

"I know they will," Jenner says.

Check out the clip below and tune into ABC Friday at 10 p.m. for Jenner's full interview with Sawyer.